Published in Journal of The Arnold Arboretum, in 1919, in volume 1, issue 1, pages 32-43

Published in Journal of The Arnold Arboretum, in 1919, in volume 1, issue 1, pages 44-60

Published in Journal of The Arnold Arboretum, in 1919, in volume 1, issue 1, pages 61-65

Published in Journal of The Arnold Arboretum, in 1919, in volume 1, issue 1, pages 66

Published in Journal of The Arnold Arboretum, in 1919, in volume 1, issue 2, pages 67-97

Published in Journal of The Arnold Arboretum, in 1919, in volume 1, issue 2, pages 97-115

Published in Journal of The Arnold Arboretum, in 1919, in volume 1, issue 2, pages 115-121

Published in Journal of The Arnold Arboretum, in 1919, in volume 1, issue 2, pages 121-146